CN215484069U

CN215484069U - Steel pipe concrete truss prestressing force superposed beam

Info

Publication number: CN215484069U
Application number: CN202121570255.3U
Authority: CN
Inventors: 赵洪波
Original assignee: Jiangsu Wanda Construction Technology Co ltd
Current assignee: Jiangsu Wanda Construction Technology Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-01-11
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses a steel tube concrete truss prestress superposed beam which comprises a steel tube, truss web reinforcements, stirrups, a concrete bottom plate and prestress reinforcements, wherein two truss web reinforcements which are obliquely arranged oppositely are fixedly welded on two sides of the steel tube, and the two truss web reinforcements are symmetrically arranged relative to the steel tube, so that a steel tube truss is formed. In the assembly production process of the device, the operation process is simple and convenient, and the technical requirement on plant operators is not high; in the field construction process, ordinary steel bars are laid on the prefabricated bottom plate and anchored in the column or the beam, then upper longitudinal bars are laid, and finally the prefabricated bottom plate and the column can be cast in situ to form a whole, so that the problem of poor node performance of the traditional fabricated building and the problem of putting up the prefabricated member beam column steel bars are solved, and the prefabricated member beam column steel bars have the advantages of good earthquake resistance and overall performance and the like.

Description

Steel pipe concrete truss prestressing force superposed beam

Technical Field

The utility model particularly relates to the technical field of building construction, and particularly relates to a steel pipe concrete truss prestress superposed beam.

Background

In the development of domestic assembly type buildings, most of the existing assembly type superposed beams are composed of common reinforced concrete, and in a large-span heavy load structure, because the strength of a reinforced material is low, the content of the reinforced concrete is high, the consumption of the concrete is large, the self weight of a component is large, a factory processing mold is complex, more embedded parts are arranged, the standardization of the component cannot be realized, the cost of the component is large, the connection of primary and secondary beam components and the connection structure of a beam column are complex, the on-site conflict between the prefabricated beam reinforced steel and the column reinforced steel is serious, and the on-site installation is very difficult.

Aiming at the problems, the utility model provides a steel pipe truss prestressed composite beam, which adopts a factory precast concrete member, and pours concrete on site after binding reinforcing steel bars on the precast member on site to form the high-strength prestressed composite beam.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a prestressed composite beam of a concrete filled steel tube truss to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the steel tube concrete truss prestress superposed beam comprises a steel tube, truss web reinforcements, stirrups, a concrete bottom plate and prestress reinforcements, wherein two truss web reinforcements which are obliquely arranged oppositely are fixedly welded on two sides of the steel tube, and the two truss web reinforcements are symmetrically arranged relative to the steel tube, so that a steel tube truss is formed;

the stirrup is provided with a plurality of, and a plurality of the stirrup is arranged along a straight line direction equidistance, a plurality of the interval is provided with a plurality of in the stirrup on the bottom surface prestressing tendons, a plurality of stirrup, a plurality of prestressing tendons and be located a plurality of bottom surface intermediate position in the stirrup the steel pipe truss is fixed mutually and constitutes the prefabricated component steel skeleton, thereby concrete has been pour to the bottom of prefabricated component steel skeleton and has been formed concrete bottom plate.

Further, as preferred, all adopt the reinforcing bar to carry out the ligature fixedly between prestressing tendons and the stirrup, between stirrup and the truss web muscle and between prestressing tendons and the truss web muscle, just prestressing tendons's both ends all extend there is sufficient anchor part.

Further, preferably, the thickness of the concrete bottom plate is set to be 50-200 mm.

Further, preferably, the steel pipe truss is located in the middle of the upper surface of the concrete bottom plate, and the steel pipes in the steel pipe truss are arranged in parallel with the prestressed tendons.

Preferably, the steel pipe is filled with high-strength mortar.

Further, as preferred, a plurality of ordinary reinforcing bars are laid on the upper surface of the concrete bottom plate, and each ordinary reinforcing bar is anchored to the concrete column.

By adopting the technology, compared with the prior art, the utility model has the following beneficial effects:

1. the device of the utility model replaces part of the steel bars by the pretensioned prestressing tendons, so that the prestressed composite beam has higher ultimate bearing capacity, deformation resistance, earthquake resistance and cracking resistance compared with the traditional cast-in-place beam.

2. In the device, the steel pipe concrete truss provides the rigidity of the member, and has little or no support in construction, thereby having the characteristics of saving and environmental protection; the assembly and the pouring forming are carried out on site, and the construction process is partially mechanized, so that the construction period is greatly shortened.

3. The utility model provides a steel tube concrete truss prestress superposed beam which is small in concrete volume, light in self weight and easy to hoist compared with a traditional precast beam.

4. In the device, the precast concrete part is thin, non-prestressed steel bars can be paved on site, the prestressed steel bars are supplemented insufficiently, the ductility of the member is improved, and steel bar conflict among the prefabricated members is avoided in installation, so that the problems of difficult manufacturing of precast beam nodes and poor node performance can be solved.

5. Compared with the traditional precast beam and cast-in-place beam, the device of the utility model utilizes the truss steel pipe to replace a large amount of stirrups, fully combines the mechanical properties of concrete, steel bars and steel pipes, exerts the high tensile strength of steel and the high compressive strength of concrete, and greatly reduces the use of the stirrups in the beam with the same volume, thereby saving the cost for engineering.

Drawings

FIG. 1 is a schematic structural diagram of steel tubes in a concrete filled steel tube truss prestressed composite beam;

FIG. 2 is a schematic structural diagram of truss web reinforcements in a steel pipe concrete truss prestressed composite beam;

FIG. 3 is a schematic structural view of a steel pipe truss in a steel pipe concrete truss prestressed composite beam;

FIG. 4 is a schematic structural diagram of stirrups in a steel tube concrete truss prestressed composite beam;

FIG. 5 is a schematic structural diagram of a prestressed tendon in a steel tube concrete truss prestressed composite beam;

FIG. 6 is a structural diagram of a steel skeleton of a prefabricated member in a prestressed composite beam of a concrete filled steel tube truss;

FIG. 7 is a schematic structural diagram of a concrete bottom plate in a steel pipe concrete truss prestressed composite beam;

fig. 8 is a structural schematic diagram of a steel pipe concrete truss prestressed composite beam after pouring.

In the figure: 1. a steel pipe; 2. truss web ribs; 3. hooping; 4. concrete; 5. ordinary steel bars; 6. and (6) prestressed reinforcement.

Detailed Description

The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Example (b): referring to fig. 1-8, the present invention provides a technical solution: the utility model provides a steel pipe concrete truss prestressing force superposed beam, it includes steel pipe 1, truss web member 2, stirrup 3, concrete bottom plate 4 and prestressing tendons 6, its characterized in that: two truss web ribs 2 which are obliquely arranged oppositely are fixedly welded on two sides of the steel pipe 1, and the two truss web ribs 2 are symmetrically arranged relative to the steel pipe 1, so that a steel pipe truss is formed; specifically, the inclination angle of the truss web reinforcement 2 and the size of the steel pipe 1 need to be determined according to the pre-design, and the steel pipe 1 replaces the traditional stirrup in the laminated beam, so as to form a steel bar framework with other steel bars, bear the shearing force and the torque, and prevent or inhibit the generation and the development of the beam section inclined crack.

Stirrup 3 is provided with a plurality of, and a plurality of stirrup 3 is arranged along a linear direction equidistance, and the interval is provided with a plurality of prestressing tendons 6 on the bottom surface in the 3 of a plurality of stirrup, and a plurality of stirrup 3, a plurality of prestressing tendons 6 and the steel pipe truss that is located the bottom surface intermediate position in the 3 of a plurality of stirrup are fixed mutually and are constituted prefabricated component steel skeleton, thereby the bottom of prefabricated component steel skeleton is pour and has the concrete form concrete bottom plate 4.

In this embodiment, all adopt the reinforcing bar to carry out the ligature between prestressing tendons 6 and the stirrup 3, between stirrup 3 and the truss web member 2 and between prestressing tendons 6 and the truss web member 2 fixed, in order to fix the position of stirrup 3 and steel pipe truss, and prestressing tendons 6's both ends all extend there is sufficient anchor part, makes it not take place the displacement behind the pouring in-process.

In this embodiment, the thickness of the concrete bottom plate 4 is set to 50-200 mm.

In this embodiment, the steel pipe truss is located at the middle position of the upper surface of the concrete bottom plate 4, and the steel pipes 1 in the steel pipe truss are all arranged in parallel with each prestressed tendon 6.

In this embodiment, the steel pipe 1 is filled with high-strength mortar or high-strength grouting material.

In the embodiment, a plurality of common steel bars 5 are laid on the upper surface of the concrete bottom plate 4, and each common steel bar 5 is anchored in a concrete column or a concrete beam; specifically, after the on-site component is installed, the common steel bars 5 are laid on the surface of the concrete bottom plate 4, then the steel bars on the top surface of the beam are bound, and after the side mold is fixed, concrete is poured to form the complete pre-tensioned pre-stressed composite beam.

In specific implementation, the utility model provides a steel pipe truss prestressed composite beam which can be prefabricated in a factory, can be directly conveyed to a construction site for hoisting and fixing to perform secondary reinforcement binding and non-prestressed reinforcement on-site binding, can be solved on-site reinforcement avoidance of the beam and the column, and can be cast in situ with a plate, the column and the like to form a whole in the on-site construction process.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a steel pipe concrete truss prestressing force superposed beam, its includes steel pipe (1), truss web member (2), stirrup (3), concrete bottom plate (4) and prestressing tendons (6), its characterized in that: two truss web ribs (2) which are obliquely arranged oppositely are fixedly welded on two sides of the steel pipe (1), and the two truss web ribs (2) are symmetrically arranged relative to the steel pipe (1), so that a steel pipe truss is formed;

stirrup (3) are provided with a plurality of, and a plurality of stirrup (3) are arranged along a straight line direction equidistance, a plurality of interval is provided with a plurality of on stirrup (3) bottom surface prestressing tendons (6), a plurality of stirrup (3), a plurality of prestressing tendons (6) and be located a plurality of bottom surface intermediate position in stirrup (3) the steel pipe truss is fixed mutually and is constituted prefabricated component steel skeleton, thereby concrete has been pour to the bottom of prefabricated component steel skeleton and has been formed concrete bottom plate (4).

2. The steel tube concrete truss prestressed composite beam of claim 1, wherein: between prestressing tendons (6) and stirrup (3), between stirrup (3) and truss web member (2) and all adopt the reinforcing bar to carry out the ligature between prestressing tendons (6) and truss web member (2) and fix, just the both ends of prestressing tendons (6) all extend there is sufficient anchor part.

3. The steel tube concrete truss prestressed composite beam of claim 1, wherein: the thickness of the concrete bottom plate (4) is set to be 50-200 mm.

4. The steel tube concrete truss prestressed composite beam of claim 3, wherein: the steel pipe truss is located in the middle of the upper surface of the concrete bottom plate (4), and the steel pipes (1) and the prestressed tendons (6) in the steel pipe truss are arranged in parallel.

5. The steel tube concrete truss prestressed composite beam of claim 4, wherein: and high-strength mortar is filled in the steel pipe (1).

6. The steel tube concrete truss prestressed composite beam of claim 4, wherein: a plurality of common steel bars (5) are laid on the upper surface of the concrete bottom plate (4), and each common steel bar (5) is anchored in the concrete column.